Annals of Botany 80: 289-297, 1997
© 1997 Annals of Botany Company
Energetic Costs of Tissue Construction in Yellow-poplar and White Oak Trees Exposed to Long-term CO2Enrichment
Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831-6422, USA
July 12, 1996 ; April 2, 1997 .
Two methods were used to estimate construction costs for leaves, stems, branches and woody roots of yellow-poplar (Liriodendron tulipiferaL.) trees grown at ambient (35 Pa) and elevated (65 Pa) CO2for 2.7 years and trees of white oak (Quercus albaL.) grown at these same CO2partial pressures for 4 years. Sample combustion in a bomb calorimeter combined with measurements of ash and nitrogen content provided the primary method of estimating tissue construction costs (WG; g glucose g-1dry mass). These values were compared with a second, simpler method in which cost estimates were derived from tissue ash, carbon and nitrogen content (VG). Estimates of WGwere lower for leaves, branches and roots of yellow-poplar and for leaves of white oak grown at elevated compared with ambient CO2partial pressures. These CO2-induced differences in WGranged from 3.7% in yellow-poplar roots to 2.1% in white oak leaves. Only in the case of yellow-poplar leaves, however, were differences in VGobserved between CO2treatments. Leaf VGwas 1.46 g glucose g-1dry mass in ambient-grown trees compared with 1.41 g glucose g-1dry mass for CO2-enriched trees. Although paired-estimates of WGand VGclustered about a 1:1 line for leaves and branches, estimates of VGwere consistently lower than WGfor stems and roots. Construction costs per unit leaf area were 95 g glucose m-2for yellow-poplar trees grown at ambient CO2and 106 g glucose m-2for trees grown at elevated CO2partial pressures. No differences in area-based construction costs were observed for white oak. Whole-plant energy content was 1220 g glucose per tree in ambient-grown white oak compared with 2840 g glucose per tree for those grown at elevated CO2partial pressures. These differences were driven largely by CO2-induced changes in total biomass. We conclude that while construction costs were lower at elevated CO2partial pressures, the magnitude of this response argues against an increased efficiency of carbon use in the growth processes of trees exposed to CO2enrichment.
Bomb calorimeter; construction costs; elevated CO2; energy allocation; global change; growth respiration; heat of combustion; respiration; Liriodendron tulipifera; Quercus alba
CiteULike 
Connotea 
Del.icio.us What's this?
This article has been cited by other articles:
|
|
 |
|
  J. D. Karagatzides and A. M. Ellison Construction costs, payback times, and the leaf economics of carnivorous plants Am. J. Botany, September 1, 2009; 96(9): 1612 - 1619. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 N. Gomez-Casanovas, E. Blanc-Betes, M. A. Gonzalez-Meler, and J. Azcon-Bieto Changes in Respiratory Mitochondrial Machinery and Cytochrome and Alternative Pathway Activities in Response to Energy Demand Underlie the Acclimation of Respiration to Elevated CO2 in the Invasive Opuntia ficus-indica Plant Physiology, September 1, 2007; 145(1): 49 - 61. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. M. Chapotin, J. H. Razanameharizaka, and N. M. Holbrook A biomechanical perspective on the role of large stem volume and high water content in baobab trees (Adansonia spp.; Bombacaceae) Am. J. Botany, September 1, 2006; 93(9): 1251 - 1264. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 H. Poorter, S. Pepin, T. Rijkers, Y. de Jong, J. R. Evans, and C. Korner Construction costs, chemical composition and payback time of high- and low-irradiance leaves J. Exp. Bot., January 1, 2006; 57(2): 355 - 371. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 M. A. GONZALEZ-MELER, L. TANEVA, and R. J. TRUEMAN Plant Respiration and Elevated Atmospheric CO2 Concentration: Cellular Responses and Global Significance Ann. Bot., November 1, 2004; 94(5): 647 - 656. [Abstract] [Full Text] [PDF]
|
|